US 3,938,617 AGranted

Speaker enclosure

AssigneeFort Enterprises, Limited

InventorLonnie R. Forbes

Life of this patent

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Abstract

An acoustic speaker enclosure of sufficiently thin design that it may be suspended from a wall and then concealed by a framed picture being hung thereover. Forwardly directed sound from the speaker radiates transversely through 360.degree. through a first passage defined in the enclosure. Rearwardly directed sound from the speaker is transmitted to the resonator frame through a second free transverse passage as well as a baffled third passage. A rearwardly disposed resonance board of the speaker enclosure is in abutting contact with the wall, and rearwardly sound from the enclosure is transmitted through this resonance board to the wall to resonate the latter to radiate sound to the room in which the speaker enclosure is disposed. Due to the multiplicity of sources of sound from the acoustic disclosure, a hearer in a room is not cognisant of the location thereof, particularly when the enclosure is concealed by a framed picture. The speaker enclosure if desired may be modified to provide a desk or table supported unit.

Claims7

Dependent claims

A loud speaker acoustic enclosure sufficiently thin as to be supported from a vertical wall and concealed by a wall mounted picture disposed forwardly thereof, said acoustic enclosure including:

a. a multi-sided resonator frame having forward and rearward edges;
b. forward and rearward resonance boards bonded to said forward and rearward edges of said frame to cooperate with the latter to define an enclosed volume, said forward resonance board having a first aperture therein that is sized for mounting a large diameter end of an electrical speaker therein, said forward and rearward resonance boards each having forward and rearward surfaces;
c. a plurality of spaced first and second blocks secured to said forward and rearward surfaces of said forward resonance board adjacent said frame;
d. a cover board rigidly secured to said first blocks and disposed forwardly of said forward resonance board and cooperating with the latter to define a transversely extending first passage;
e. a baffle sheet of smaller transverse area than the interior of said frame that is transversely spaced from the latter and disposed in said enclosed volume, said baffle sheet supported from said second blocks parallel to said forward and rearward resonance boards, said baffle sheet having a second aperture therein through which the magnet end of the electrical speaker may extend, said magnet end and second aperture defining an annulus space therebetween said baffle sheet having forward and rearward surfaces;
f. a plurality of elongate spaced first baffles secured to said rearward surface of said baffle sheet and on opposite sides of said second aperture, with forwardly directed sound from said speaker travelling transversely through said first passage to emanate radially from all sides thereof, and rearwardly directed sound from said speaker to said resonator frame both through a second transverse passage defined between said rearward surface of said forward resonance board and forward surface of said baffle sheet as well as through said annulus and a transverse labyrinth defined by said first baffles, said forward surface of said rear resonance board and said rearward surface of said baffle sheet, and rearwardly directed sound also traveling through said rearward resonance board to said wall to resonate the latter;
and
g. means for supporting said enclosure from said wall with said rearward resonance board in abutting contact with the latter.

5 more elements

A loud speaker acoustic enclosure suitable for being supported on a desk or table, said acoustic enclosure including:

a. a generally square resonator frame of sufficient width as to remain in an upright position when resting on a desk or table;
b. forward and rearward resonance boards bonded to said forward and rearward edges of said frame to cooperate with the latter to define an enclosed volume, said forward resonance board having a first aperture therein that is sized for mounting a large diameter end of an electrical speaker therein, said forward and rearward resonance boards each having forward and rearward surfaces;
c. a plurality of spaced first and second blocks secured to said forward and rearward surfaces of said forward resonance board adjacent said frame;
d. a cover board rigidly secured to said first blocks and disposed forwardly of said forward resonance board and cooperating with the latter to define a transversely extending first passage;
e. a baffle sheet of smaller transverse area than the interior of said frame that is transversely spaced from the latter and disposed in said enclosed volume, said baffle sheet supported from said second blocks parallel to said forward and rearward resonance boards, said baffle sheet having a second aperture therein through which the magnet end of the electrical speaker may extend, said magnet end and second aperture defining an annulus space therebetween said baffle sheet having forward and rearward surfaces;
and
f. a plurality of elongate spaced first baffles secured to said rearward surfaces of said baffle sheet and on opposite sides of said second aperture, with forwardly directed sound from said speaker traveling transversely through said first passage to emanate radially therefrom, and rearwardly directed sound from said speaker to said resonator frame both through a second transverse passage defined between said first resonance baord and said baffle sheet, as well as through said annulus and a transverse labyrinth defined by said first baffles and said baffle sheet and rear resonance board.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/546,315Filed 7 Feb 1975 · continuation in part
Priority: 17 Jan 1974
Granted: 17 Feb 1976
Term ends: Not estimatedThe source records don’t support an estimate.

Classification3 codes

H04R 1/345
By using a single transducer with sound reflecting, diffracting, directing or guiding means: for loudspeakers
H04R 1/025
Casings; Cabinets ; Supports therefor; Mountings therein: arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
H04R
Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers